Magnetic clutch.



PATENTED MAR.-24, 1908.

I No. 882,607.

R. ANDERSON. MAGNETIC GLUTGH. APPLIOATION FILED SEPT.18, 1906.

2 SHEETS-$11331 IL.v

/m/enZ 0r" Robertflnderson,

away.

Witnesses:

PATENTED MAR. 24, 1908.

R ANDERSON. MAGNETIC CLUTCH. APPLICATION FILED SEPT. 18, 1906.

2 SHEETS-SHEET 2.

- W/Lnesses: Mventdr:

' Robert finder-son,

by WM 1 ROBERT ANDEBSON, OF SCHENECTADY, NE

W YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

MA GNE TIC CLUTCH.

No. 882,607. Specification of Application filed September T all whom itmay concern:

Be it known that I, ROBERT ANDERSON, a subject of the King of Sweden,residing at Schenectady, county of Schenectady, State of New York, haveinvented certain new and useful Improvements in Magnetic Clutches, ofwhich the following is a specification.

My invention relates to magnetic friction' clutches, and its object isto provide a novel clutch construction of high efficiency, in which theclutch parts are wholly inclosed. One feature of my invention consistsin providing a clutch-magnet with two armatures arranged on oppositesides of the magnet movable towards each other into engagementtherewith. This construction gives a large frictional drag with a smallmagnetizing current as compared with struc tures employed heretofore.

My invention further consists in providing a casing carried by eitherthe driving or driven shaft completely inclosing the magnet andarmatures, so as to protect them frominjury, and still further consistsin arranging this casing so that it forms a suitable drum for a bandbrake, thereby particularly adapting the clutch for use in hoists andsimilar work.

My invention will best be understood by reference to the accompanyingdrawings, in which Fi urel shows a cross-sectional view of a clutcconstructed in accordance with my invention; Fig. 2 shows an end viewwith a portion of the casing andone of the armatures removed; and Figs.3 and 4 show similar views of a modified construction.

V Referringfirst to Figs. 1 and 2, A andB rep resent two aXially-alinedshafts, of which A may be the driving shaft, and B the driven. Crepresents the clutch-magnet which is carried by and surrounds the shaftA. D rep resents the magnetizing winding, which extendscircumferentially' around the shaft, .and' is connected tocollector-rings d'. The

imagnet C is formed with radially projecting poles, all of which lie inthe same plane, but

which extend outward alternately from opposite sides of the winding D.Alternate Boles are, consequently, of the same polarity. represents aninclosing casing, which is inst to the shaft B, and which completelyincloses the magnet C. This casing may be sleeved on the shaft A, asshownjlso as to Letters Patent. Patented March 24, 1908 18,1906. SerialNo. 335,079.

make an air-tight inclosure for the magnet. Two armatures F are keyed onthe inner periphery of the casing E on opposite sides of the G areplaced between the armatures, so as to energized. When the windin withcurrent, both armatures F are simultaneously drawn axiallyintofrictional engagement with the poles of the magnet C, so as totransmit power from one shaft to the a suitable drum for a band brake H,which may be controlled in any well known manner, either mechanically.or electrically, through the pivoted lever I. The clutch is and otherapparatus requiring a brake.

In the construction shown in Figs. 3 and 4, the magnet C is arrangedwithout oles and consists of a disk-shaped member ormed of two parts inthe shape of concentric rings, between which is mounted the magnetizingcoil D. This coil is held in place between two rings (1 which may be ofbrass or othernon-magnetic material, which serve to unite theconstruction shown in these figures the flux produced by the coil Dpasses through the two armatures-in series. The arrangement of thecompression springs G is slightly otherwise, the construction issimilar. The band brake is not shown in these figures.

Many other modifications in the construction and arrangement of partsmay be made without departing from the spirit of my invention. What Iclaim as new and desire to secure by Letters Patentof the United States,is,-

1. A magnetic clutch comprising a magnet, an energizing Windingtherefor, and two mechanically connected armatures on opposite sides ofsaid magnet movable towards each other into engagement with said magbotharmatures simultaneously.

2.. In amagnetic clutch, in combination with a shaft, a magnet carriedby and surrounding the, shaft, an energizing Winding therefor, and twomechanically-connecte rin -shaped armatures on o posite sides of saimagnet axially movab e into engagepoles of the magnet 0. Compressionspringshold them away from the magnet C, as shown in Fig; 1, when theWinding D-is not:

is supplied other. The periphery of the casing E forms' consequentlywell adapted for use in hoists the two rings which form the magnet C. In

different from that shown in Fig. 1, but

net, the magnet being arranged to attract springs between ment with saidmagnet, the magnet being arra ed to attract both armatures simultaneousy. 1

3. A magnetic clutch comprising a magnet, an energizing windingtherefor, two mechanically-connected armatures on .o posite sidesof-said magnet movable towardb each other into engagement with saidmagnet, the magnet being arranged to attract both armaturessimultaneously, and compression said armatures adapted to move themapart when'said engaging Wind- 'ing is deenergized.

fi. In a-magnetic clutch, in combination with a shaft, a magnet carriedby and surrounding the shaft, an energizing winding therefor, twomechanically-connected ringshaped armatures on opposite sides of said manet axially movablev into engagement with said magnet, the magnet beingarranged to attract both armatures simultaneously, and compressionsprings between said armatures adapted to move them apart when saidenergizing winding is denergized.

5.. In a ma netic clutch, in combination with axially-aimed driving anddriven shafts,

, a magnet carried by and surrounding one of said shafts, an energizingwinding therefor, and tworing-shaped armature-s carried by the othershaft on opposite sides of said magnet and axially movable intoengagement therewith the magnet being-arranged to at.

tract both armatures simultaneously.

a' r 6; In a magnetic clutch, in combination other shaft on'op' ositesides '40 ing carried by magnet, and two armatures carried within saidcasing on op osite sides of said magnet and axially mova le intoengagement therewith, the magnet being arranged to attract botharmatures simultaneously.

8. In a magnetic clutch, in combination with aXially-alined driving anddriven shafts,

a magnet carried by and surrounding one shaft, an energizing windingtherefor, a cas- 1ng carried by the other shaft mclosing said magnet,two armatures carried within said casing on opposite sides of saidmagnet and axially movable into engagement therewith.

the magnet being arranged to attract both armatures simultaneously, andcompression springs between said armatures adapted to move them apartwhen said energizing winding is'denergized.

9. In a magnetic clutch, in combination with axially-alined driving anddriven shafts, a magnet carried by and surrounding one shaft, anenergizing winding therefor, a easing carried by the other shaftinclosing said magnet, two ring-shaped armatureskeyed on the innerperiphery of said. casing on opposite sides of said armature and axiallymovable into engagement therewith. and compression springs between saidarniatures adapted to force them apart when said energizing winding isdenergized.

10. In amagnetic clutch, in conibina vn with axially-aimed driving anddriven sh;v its,

a magnet carried by and surrounding one of said shafts, an energizingwinding therefor, tworing-shaped other shaft on opposite sides of saidmagnet and axially movi ole into engagement therewith, the magnet beingarranged to attract both arinatures, a casing carried by one of saidshafts. inclosing the magnet and armatures, and a brake-band engagingthe periphery of said casing.

, In Witnesswhereof. I have hereunto set my hand, this 17th day ofSeptember, 1906.

ROBERT ANDERSON.

-Witnesses:

' BENJAMIN B. HULL,

HELEN ORFORD.

armatures carried by they

